Sigma brushes are some of my absolute favourites! Right now, if you head over to GILT you will find that they have an offer to buy several different denominations of Sigma Beauty credit vouchers, discounted at 50% off! In addition to this, I noticed you can use code GIVE25 at checkout if you are buying a $75+ voucher, and it will take $25 off your total, which means you only pay $50 for $150 worth of Sigma credit! (which you can use at Sigma’s website)
I also made sure to use my EBATES account to get 8% cash back!
I originally heard about the gilt sale from the wonderful USGWP.com. I then searched for codes that would work until I found the code above. Enjoy!